Heating & Cooling · Repair, replace or choose · Updated November 2026
AC Repair vs. Replacement: How to Decide
A newer system with a single failed part is usually worth repairing. An older system that needs a major repair, uses phased-out refrigerant or keeps breaking down is often better replaced. Central AC replacement runs $3,900–$7,900 nationally.
Lean toward repair when
- The system is less than about 10 years old and has been reliable.
- The problem is a common, lower-cost part such as a capacitor, contactor, fan motor or clogged drain line.
- The repair is covered by a parts warranty.
- The house stays comfortable and energy bills have not jumped.
Lean toward replacement when
- The system is roughly 10–15 years old or more, a common lifespan for central AC.
- It needs a compressor or coil, which are among the most expensive repairs.
- It uses R-22 refrigerant. Production of R-22 ended in the U.S. in 2020, so recharging an R-22 system with a leak is expensive.
- It has needed several repairs in the last few years.
- Some rooms never get comfortable (uneven temperatures).
A common rule of thumb: multiply the system's age by the repair cost. If the result is more than about $5,000, replacement is worth pricing. It is a starting point, not a rule.
Replacement costs to compare
| Option | Typical cost | What it covers |
|---|---|---|
| Central AC replacement | $3,900–$7,900 | Installed |
| Heat pump instead of AC | $4,200–$7,600 | Installed |
| Furnace and AC together, with ductwork | $8,500–$19,200 | Project total |
| High-SEER upgrade | $1,000–$2,000 more | Add-on |
From our HVAC cost guide.
Questions to ask the technician
- What exactly failed, and can you show me?
- Is the part under warranty?
- What refrigerant does the system use, and is there a leak?
- If I replace, would you do a load calculation to size the new system?
- Should I replace the indoor coil or furnace at the same time so the system is matched?
Cost figures are national ranges from the sources listed in our heating & cooling cost guide, not a quote from FixFinch or any contractor. Calls connect you with an independent service provider in our network. FixFinch is not a contractor and does not perform the work.